19171 FIELB CROPS. 643 



ing. The upper leaf is attached to its sheatli at an angle of approximately 

 45°, and the long side of the sheath first begins inroUing. Tall plants showed 

 a long iuroll of the upper sheath as compared with dwarf plants, that character 

 being also associated with a large number of pendant heads. 



Root pruning and a consequent limitation of the food supply increased the 

 number of erect heads and decreased the number of pendant heads. Further- 

 more, a limitation of the moisture and food supply of the individual plants by 

 reducing the feeding area per plant resulted in an increased number of erect 

 heads and a decrea.sed number of pendant heads. 



Measurements of internode and sheath lengths in both milo maize and Kafir 

 corn showed that while the internode lengths varied widely under different en- 

 vironmental conditions, the sheath length remained quite stable. A variation 

 of the internode length without a corresponding change in the sheath length 

 resulted in an overlapping of the internode in varying degrees when the same 

 plant was grown under different conditions. Long overlapping of the sheath 

 probably furnished support to the stem and the peduncle, while a short over- 

 lapping supplied correspondingly little support. The removal of the inroUed 

 sheath tip before any part of the head appeared resulted in an increased per- 

 centage of erect heads. It appeared that in milo maize the tightly inrolled 

 upper leaf sheath tip influenced the position of the head. 



The culture of early potatoes under glass {Jour. Bd. Agr. [London], 23 

 {1911), No. 10, pp. 976-97S).— This is a brief general discussion of the produc- 

 tion of early potatoes under glass. Several early and second early varieties 

 are recommended for use, and directions are given for the prepai-ation of the 

 soil, planting, and the care of the house during the growing season. 



The morphology and development of transplanted rice, B. Marcakelli 

 {Gior. Risicolt., 6 {1916), Nos. 13-U, pp. 211-222; 22, pp. 341-347; 23, pp. 357- 

 364; 24, pp. 372-378, figs. 2i).— The morphology and development of transplanted 

 rice is compared with that of rice seeded in the field. The author discusses 

 in particular the morphological effects of transplanting on the root system, the 

 aerial portions of the plant, stem development, and development of the rachis. 



The increased development following transplanting is illustrated. 



Studies of the volume weight of hulled rice grains, M. Kondo {Ber. Ohara 

 Inst. Landiv. Forsch., 1 {1916), No. 1, pp. 1-26, pis. 2). — This reports studies 

 with rice to determine the correlation between volume weight and such grain 

 characteristics as size and form of kernel, water content, mixture uf whole 

 and broken kernels, impurities, etc., since volume weight is a recognized factor 

 in determining the value of rice on the Japanese market. 



Similar studies with barley, wheat, rye, and oats are noted. 



Considerable data are presented in tabular form and graphs drawn to 

 illustrate the correlations studied. 



In studying the relationship between the water content of hulled rice and its 

 volume weight, the experiments included drying by the heat of the sun, drying 

 in a desiccator with sulphuric acid or calcium chlorid, and drying in an oven. 

 A fourth experiment was planned to study this relationship in hulled rice 

 kernels which had been dried by the sun's heat before hulling. 



The volume weight of hulled rice kernels is influenced by different factors, 

 the relationship between volume weight and these factors being as follows: 

 Factors causing an increase in volume weight were smooth seed coat ; thick, 

 round, short-elliptical kernels; the addition of small kernels; the mixing of 

 large and small kernels of the same kind ; and sun or oven drying of the seed 

 before hulling. Factors which caused a decrease in volume weight were a 

 rough seed coat; long, thin kernels; broken shrunken kernels, straw, chaff, 



